Effect of Frequency and Duty Cycle of a Full-Spectrum Pulsed LED Light Source on Plant Photosynthetic Rate

Wei Wei, Guoyi Zhang, Jintian Lin, Lei Chen, Min Wang, Yuxin Tong

2022

Abstract

In this study, we reviewed the research progress on the use of pulsed lighting for plants and presented the concept of a full-spectrum pulsed LED light source panel. The changes in photosynthetic photon flux density (PPFD) at 25 cm below the lamp plate in response to changing light source frequency and duty cycle were measured. Furthermore, changes in photosynthetic rate with frequency were studied under a fixed duty cycle of the light source. The photosynthetic rate was greatest at 100 Hz. Additionally, the photosynthetic rate with a fixed light source frequency was highest at a duty cycle of 40%. Since PPFD cannot be maintained at a fixed frequency or duty cycle alongside a change in duty cycle or frequency, the concept of photo carbon ability is proposed here (photo carbon ability = photosynthetic rate/PPFD, which refers to the number of carbon dioxide molecules that can be induced into photosynthesis by a photon). The changes in the optical carbon ability with varying frequency were studied under a fixed duty cycle of the light source. The optical carbon ability was greatest at 100 Hz. Compared with traditional continuous light sources, this pulse frequency is expected to save 40% energy.

Paper Citation

in Harvard Style

Wei W., Zhang G., Lin J., Chen L., Wang M. and Tong Y. (2022). Effect of Frequency and Duty Cycle of a Full-Spectrum Pulsed LED Light Source on Plant Photosynthetic Rate. In Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE; ISBN 978-989-758-639-2, SciTePress, pages 144-149. DOI: 10.5220/0011948800003536

in Bibtex Style

@conference{iswee22,
author={Wei Wei and Guoyi Zhang and Jintian Lin and Lei Chen and Min Wang and Yuxin Tong},
title={Effect of Frequency and Duty Cycle of a Full-Spectrum Pulsed LED Light Source on Plant Photosynthetic Rate},
booktitle={Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE},
year={2022},
pages={144-149},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011948800003536},
isbn={978-989-758-639-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 3rd International Symposium on Water, Ecology and Environment - Volume 1: ISWEE
TI - Effect of Frequency and Duty Cycle of a Full-Spectrum Pulsed LED Light Source on Plant Photosynthetic Rate
SN - 978-989-758-639-2
AU - Wei W.
AU - Zhang G.
AU - Lin J.
AU - Chen L.
AU - Wang M.
AU - Tong Y.
PY - 2022
SP - 144
EP - 149
DO - 10.5220/0011948800003536
PB - SciTePress